here is a portion of the email I received from Evan:
The nearest repair facilities that we have worked with before can be found below. If you know of a service tech that is closer to you, we would still provide parts (if available). The D series amplifiers are at the age where many of them need the electrolytic capacitors in the power supply replaced. We do not have the parts for this procedure any longer, but a good technician can often retrofit modern parts to keep it running.
HEAR (High End Audio Repair) in Brooklyn
https://goo.gl/maps/NZTQiFbmMo7GF1f56
Technetron in Manhattan
https://goo.gl/maps/SyJpDNMfEJuZ7TCs8
If you would like to ask for local advice on an audio forum, I recommend www.audiogon.com. It’s free to register and it’s the largest online audio community I am aware of. There is a lot of good information to be found there.